import sys
input = sys.stdin.readline

N=int(input())
C=[list(map(int,input().split())) for i in range(N)]

ANS=[1<<60]
DP=[[1<<60]*(3**N) for i in range(N)]

def shuku(A):
    k=0
    for i in range(N):
        k+=A[i]*(3**i)
    return k

def modos(x):
    S=[0]*N
    for i in range(N):
        S[i]=(x%(3**(i+1)))//(3**i)
    return S
        

def calc(xx,f):
    A=modos(xx)

    if sum(A)==2*N:
        ANS[0]=min(ANS[0],DP[f][xx])
        return
    if sum(A)==2*N-1:
        x=A.index(1)
        if x==f:
            ANS[0]=min(ANS[0],DP[f][xx])
            return
            
    for i in range(N):
        if i==f:
            continue
        if A[i]==2:
            continue

        A[i]+=1
        if DP[i][shuku(A)]>DP[f][xx]+C[f][i]:
            DP[i][shuku(A)]=DP[f][xx]+C[f][i]
        A[i]-=1

A=[0]*N
for i in range(N):
    A[i]+=1
    DP[i][shuku(A)]=0
    A[i]-=1

from itertools import product
L=sorted(product([0,1,2],repeat=N),key=sum)

for l in L:
    for i in range(N):
        calc(shuku(l),i)

print(ANS[0])